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  1. JDK
  2. JDK-8148128

Regression: array constructor references marked as inexact

    Details

    • Subcomponent:
    • Introduced In Version:
    • Resolved In Build:
      b104
    • CPU:
      x86
    • OS:
      linux_redhat_6.0
    • Verification:
      Verified

      Description

      FULL PRODUCT VERSION :
      java version "1.8.0_66"
      Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
      Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)


      ADDITIONAL OS VERSION INFORMATION :
      Linux 2.6.32-573.3.1.el6.x86_64

      A DESCRIPTION OF THE PROBLEM :
      u51 javac compiles with a warning but u60 and later javac gives an error. I see no corresponding release note about change in behavior.

      REGRESSION. Last worked in version 8u51


      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      Ambiguity.java:14: error: reference to doSomething is ambiguous
              doSomething(Stream.of("Foo", "Bar").map(Collections::singletonList).toArray(List[]::new));
              ^
        both method doSomething(List<String>[]) in Ambiguity and method doSomething(Set<String>[]) in Ambiguity match
      Note: Ambiguity.java uses unchecked or unsafe operations.
      Note: Recompile with -Xlint:unchecked for details.


      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      import java.util.*;
      import java.util.stream.*;

      public class Ambiguity {
          public static void doSomething (List<String>[] stuff) {
              System.out.println("List Stuff");
          }

          public static void doSomething (Set<String>[] stuff) {
              System.out.println("Set Stuff");
          }

          public static void main (String[] args) {
              doSomething(Stream.of("Foo", "Bar").map(Collections::singletonList).toArray(List[]::new));
          }
      }

      ---------- END SOURCE ----------

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              • Assignee:
                mcimadamore Maurizio Cimadamore
                Reporter:
                webbuggrp Webbug Group
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                • Created:
                  Updated:
                  Resolved: